guest ::
| Home > Publications database > Automatische Zeitschaltuhr für fotographische Debye-Scherrer-Messung von Kristallpulvern |
| Home > Publications database > Automatische Zeitschaltuhr für fotographische Debye-Scherrer-Messung von Kristallpulvern |
| Book/Report | FZJ-2017-06141 |
; ;
1972
Kernforschungsanlage Jülich, Verlag
Jülich
Please use a persistent id in citations: http://hdl.handle.net/2128/15173
Report No.: Juel-0862-AC
Abstract: For the quantitative determination of crystal powder mixtures the photographie Debye-Scherrer technique offers considerableadvantages over measurements using Geiger-Muller counter goniometer. Firstly, smaller amounts can be analysed and secondly, the particular geometry of the ray path permits the analysis of coarser crystal powders. The disadvantages of the Debye-Scherrer technique are the additional work to develope the films, the increased possibility of errors when many films are developed, the preparing of characteristic curves to determine the relative intensities of single-phase powders, and the necessary photometric measurements. When a Weisenberg goniometer and exposures with small aperture are used the first two disadvantages can be omitted by combining many diffraction pattern on the same film. To minimize the work when preparing the sequence of exposuresfor the characteristic curves and to increase the measuring accuracy for standard mixtures an automatic time clock was developed. It opens and shuts a window in the X-ray path of the X-ray apparatus (e.g. Philips, PW 1316) for a pre-fixed time and controls the advance of the carriage of a Weisenberg goniometer (e.g. Enrof-Nonius Y800, figure 1) between two consecutive X-ray exposures.An apparatus for the subsequent automatic photometry of the films with step-scanning by a Microdensitometer II (Enraf-Nonius) and the recording of the photometric values on punch tape of a teleprinter (Teletype ASR 33) is at present developed.
|
The record appears in these collections: |
PDF
Fulltext by OpenAccess repository